peak flow meter
Worth a lookShows low returns (0.2%), but a concentrated shelf (top 5 take 85% of clicks) keeps it on the watch list.
Returns
Incredible0.2%return rate — above 5% kills the launch gate
Conversion
Incredible14.1%search→purchase rate — share of searches ending in a sale
Avg price
Great£22.00avg listing price — sweet spot $15–$100
Review moat
Great279.56avg incumbent reviews — the moat a new listing must climb
Price range
Great£6.64–£75.40cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Okay£167K£167K/yr · 54K searches
Brand share
Okay85%top-5 brand share — brands hold most of the demand
Growth
Bad-21.9%90-day search growth — must beat 0% to launch
Competition
Bad85%top-5 click share — a locked-up shelf
According to Flapen's Amazon United Kingdom niche tracking, peak flow meter is a £167K/yr Amazon United Kingdom market (54K searches/yr). The top 5 brands hold 85% of demand. Demand peaks in Jan. Verdict: Worth a look — 50/100.
Data updated Jul 21, 2026 · scored weekly · How we score niches
peak flow meter market data
- Units sold / yr
- 8K–10K
- avg 1,000–1,250/product
- Revenue / yr
- £176K–£220K
- units × avg price
- Conversion rate
- 14.1%
- Avg BSR
- #1,703
- Page quality
- 0%
- Prime
- 78%
- Sponsored
- 33%
- Out of stock
- 2.9%
- Avg brand age
- 68 months
- Avg seller age
- 200 days
Competition & brand share
The top 5 products capture 85% of clicks — a locked-up shelf that new listings rarely crack.Brands
9 rising
Sellers
20
Top-5 brand share
85%
Top 20: 100%
Top-5 click share
85%
Top 20: 100%
Open market
9%
- KNOXZY47%
- Mini Wrights15%
- YUANYUU9%
- VED7%
- Nascool7%
- Generic5%
- Open — no brand owns it (3 brands, 9%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -21.9% search growth over the last 90 days.Peak months: Jan · busiest ÷ quietest = 1.5×
Top peak flow meter search terms
- peak flow meter for adults uk29K/yr
- peak flow meter21K/yr
- peak flow4K/yr
Top peak flow meter products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 9 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
KNOXZY Peak Flow Meter for Adult to Monitor Lung Function - Expiratory Flow Meter to Monitor Respiratory Condition - Spirometry Lung Function Recovery Training Device - Standard Range for Adult
KNOXZY£8.374.4★566 rev
Mini Wrights Standard Peak Flow Meter
Mini Wrights£8.694.7★193 rev
Easy Peak Flow Meter for Adult to Monitor Lung Function Expiratory Flow Meter Color Coded Indicator Standard Range for Adult Lung Test Device Lung Capacity Tester (White)
YUANYUU£10.574.3★43 rev
VED Peak Flow Meter for Adults Standard Range Expiratory Flow Meter for Lung Function Monitoring Portable Spirometry Breathing & Respiratory Training Device
VED£8.324.2★22 rev
Peak flow meter for adults uk with Bluetooth App Tracking Risk Indicator PEF & FEV1
Nascool£75.404.4★147 rev
Newest
by launch dateVED Peak Flow Meter for Adults Standard Range Expiratory Flow Meter for Lung Function Monitoring Portable Spirometry Breathing & Respiratory Training Device
VED£8.3222 rev
Peak flow meter for adults uk with Bluetooth App Tracking Risk Indicator PEF & FEV1
Nascool£75.40147 rev
Easy Peak Flow Meter for Adult to Monitor Lung Function Expiratory Flow Meter Color Coded Indicator Standard Range for Adult Lung Test Device Lung Capacity Tester (White)
YUANYUU£10.5743 rev
KNOXZY Peak Flow Meter for Adult to Monitor Lung Function - Expiratory Flow Meter to Monitor Respiratory Condition - Spirometry Lung Function Recovery Training Device - Standard Range for Adult
KNOXZY£8.37566 rev
Easy Peak Flow Meter for Adult to Monitor Lung Function | Expiratory Flow Meter | Color Coded Indicator | Standard Range for Adult | Include Instructions and Blank Charts Color Coded Indicators
Generic£6.6414 rev
Trending
90-day click momentumPeak flow meter for adults uk with Bluetooth App Tracking Risk Indicator PEF & FEV1
Nascool£75.404.4★
VED Peak Flow Meter for Adults Standard Range Expiratory Flow Meter for Lung Function Monitoring Portable Spirometry Breathing & Respiratory Training Device
VED£8.324.2★
Vitalograph 43602 Peak Flow Meter NHS (pack of 1)
Vitalograph£10.504.6★
AirZone Personal Peak Flow Meter (EU Scale)
Air Zone£9.274.5★
Easy Peak Flow Meter for Adult to Monitor Lung Function | Expiratory Flow Meter | Color Coded Indicator | Standard Range for Adult | Include Instructions and Blank Charts Color Coded Indicators
Generic£6.644.8★
What buyers say about peak flow meter
What buyers praise and complain about, mined from review topics.What buyers love
“easy to use”
“Affordable”
“Efficient”
“a good monitor”
“Accurate and thoughtfully designed for easy use”
“Good for self monitoring”
“It links to your iphone so all the data is stored immediately”
“great light weight feel”
“this is a handy device to easily measure my progress improving my lung capacity”
“Its been dropped a few times and not broken”
What buyers complain about
“which makes it harder to rely on for consistent monitoring”
“Difficult to use not sure if works properly”
“Before I received this product I was concerned as to how accurate it would be”
“Although it wasnt cheap I would recommend this device”
“Very flimsy, scale hard to read”
“After a winter of relative inactivity I was noticing that my breathing was quite shallow”
“Not for medical diagnosis”
Top return reasons
Common questions
- Is peak flow meter profitable to sell on Amazon United Kingdom?
- The niche generates £167K/yr across 9 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -21.9%. Flapen's verdict: Worth a look (50/100).
- How competitive is the peak flow meter niche?
- 9 brands and 20 sellers compete. The top 5 products take 85% of clicks and top 5 brands hold 85% of demand.
- What do buyers complain about in peak flow meter?
- Top complaints mined from reviews: Measurement/Reading Accuracy, Ease Of Use, Accuracy-Overall. The return rate is 0.2%.
- When does demand for peak flow meter peak?
- Demand peaks in Jan; the busiest month runs 1.5× the quietest.
- What does it cost to enter the peak flow meter niche?
- Listings span £6.64–£75.40; the average listing price is £22.00 (sweet spot $15–$100). The average incumbent carries 280 reviews — the moat a new listing must climb.